Telegraphy.



. No. 846,415, PATENTBD MAR. 5, 1907 I. KITSEE.

TELEGRAPHY.

APPLICATION FILED PEB.26,1906.

2 SHEETS-SHEET l.

PATENTE) MAR. 5, 1907.

KITSEE. QELEGRAPHY. APPLIM TIGN FILED FEBA 2G, 1906.

2 SHEETS-.SHEET 2.

UMTED STATES PATENT OFFICE.

ISIDOR KITSEE, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE\` HALF TO WILLIAM QI. LATTA, OF PHILADELPHIA, PENNSYLVANIA.

TELEGRAPHY,

Application led February 26,

To all who/'11, it may] concern:

Be it known that I, Isinon Irrsnn, a citizen of the United. States, residing at Philadelphia, in the county or Philadelphia and State of Pennsylvania, haveinvented certain new and. useful Improvements in 'l`elcgraphy, of which the `lollou ing is a speci'lication.

l, My invention relates to an improvement in telegraphy, and has more special reference to 1o the transinitting device.

On land-lines the usual arrangement of telegraphing is that a transmitting-key opens and closes a line provided with a source of current, having one pole always connected i 5 to this line. The transmitting-key is nsuall y a metallic base, a lever electrically in connection with said base, and the 'front contact electrically insulated Yfrom said base. @ne part oi the line is connected to the base, and

zo therefore the lever and the other part or the line is connected to the contact. The downward stroke of' the levercloses the line, and the releasing olE the lever opens the line. On lines v ith great capacitywsuch, lor instance,

on' cables aerial or subterranewthe televgraphing with one polarity is not advantageous, for the reason that the line chokes il not enough 'time is given after each impulse to discharge the same.

3o My object is to produce a transmitting device whereby vvith the aid 'of a common Morse key reversals may be sent over the line, thereby making it possible to transmit messages over a cable at a comparative great speed.

As this my invention has only reierence to the transmitting device, it is not necessary to describe in detail, the receiving device. It sullces to say that the same should consist ot' 4o a polarized device.

' Re'erring to the drawing, Figure 1 represents in diagrammatic view my transmitting device in connection sith the key proper; and Fig. 2 is a perspective view ol the transmitting device, the key excluded.

A is'the key proper; B, the attachment to the key in its entirety. The key comprises the metallic base ,8, the lever 1, the point g, the switch 5, and the contacts 2 and The 5o lever is, as usual, in electrical contact with the base, and the point is, as usual, insulated from said' hase. In the transmitting-keys used to-day on landlines the key clcses the line nprmallythat is, when not in use" Speccation of Letters Patent.

.Patented March 5, 1907.

1906. Serial No. 302,984.

through a switch substantially as shown in the dran ing; but in the usual arragement the contact 2 is connected nith the point g, and the switch is connected ith the metallic base. W hen the operator desires to tele graph, -he opens the Snitch-that is, moves 6o the saine to the right and then opens and closes the line through the movement of the lever of the key. In my arrangement the key is not connected to the line, but is'connected to a localized circuit, and its connec 65 tien, as to the line, the key, and sources of current, is as follows: The battery 4, here shown as to "consist of three cells, is connected, through n ire 18, Withone pole to the sn itch 5 of the keyA and n ith the other pole 7o to the junction or" nire 20, connectingtogether the coils of the two electromagnets 7 and 1 0. 'i he other terminal ofelectromagnet 7 is connected through n ire 21 ith contact 6 ot' the key, and the other terminal ol' electro- 75 magnet 10 is connected, through n ire 17, n ith peint g of the key. rl"he electromagnet 10 is provided ith armature 15 and in juxtaposition thereto the contact-points 11 and 12, and the electromagnet 7 is provided n ith arma- 8o ture 16 and in juxtaposition thereto the contact-points 13 and 14. 'Ihe contactoints 12 and lll are electrically connecte, sith each other, so also are in electrical connection the contact-points 11 and 13. A source 85 of current 3,here shown as to consist only ot' two cells, but in reality to consist ot' such number of cells as the line requires, is connected to the pole, here shown as a positive, n ith contact 11 and through the same` with 9o contact 13 and is connected n ith the other pole to contact 12 and through the saine n ith contact 14. rIhe armature 15 is connected to the line L, and the armature 1G is connected to the ground G, Normally-that is, when the device is idletite switch 5 o1" tle key is in a position so as to contact with 2. 'I'lis contact is insulatcd from all otlcr parts of the key proper. The circuit containirg eleclromagnet 7 is roo therefore open, so also is the circuit containing electroinagrct 1() open, ard the armatures 15 and 16, bcirg providtd with sprinefs,` will rest on tle point s 12 ar d' 1 Ll, rc spectivey. A circuit is therefore established over the 'm5 line L direct to the ground ard corsislii'g of -5 armature 15, Contact 12, contact 1/1, armature 16, and the ground G.

2, ses die;

the circuit containing the elecironia-gnct i.

This will result in the energizing ot electroni:giiet 7 and the drawing or ine a rniaiure 1o' from contact 14 toward to and in connection With Contact 13. 'line direct circuit hetvveen the line and ground is ti'iereby broken and the circuit is established, including line li, armature 15, contact .12, batter)r i5, contact 13, armature 1't3, and ground Gr. ln this arrangement the positive pole of the battery is connected ,to the ground and the negative pole te the line. Ilow over the line iii the direction of the unfeathered arrow. This inipulse is c# lled bv nie the cleariig-impulsel and will onli7 at'- fect the translating device att the rec livingl 'f5 site l'ron'i itsl l'ormer tamncetion.

station in a manner so as to produce what. is called a space After the closing of the circuit containing electroniag-.iet 7 ne manipulates the key in the usual miuiner--tnat is, lie depresses the lever for a short period to transmit a dot and for a long period to transinit a dash, and ne allows the hey to remain open for a short period to denote a short space and tor a longperiod to denote a longer spice. The coil or electrtiunagnet 7 is, considered in relation to the coil ol electromagiiet- 10, of f :oinpiirative high resistance, and l had good results ivith a device in which the coil of elcetroniagnet 7 had twenty-'live ohms and the coil ol' electromagnct 1t) had tive ohms. 'lheproportion, therefore, ot" one to iive seemed io poses, .i

,its long as thc lever of the key is not depressed the current will tlou' throughv electroinzignet T, and the strength otl three cells, or of as many cells as are desired, is sin'iicicnt to energize the saine and move the armature from its resting-place; hut. as soon as the lever oiI the keiy is depressed the circuit etnbraciLig elcctromagnet ttl is closed, and as this circuit is ol' lower resistance than the circuit containing electromagnet 7 it is obvious that tnev greatest amount olI current \\'ill [low through the coil oi electroniaggnet It). 'the electroni ignct T will then be to the Lgreatest extent dcniagnetized, and the armature ttl will again be drawn b v it.- springtoward lo and iii connection with contact It: but the armature l of elccromagnct ,itl will hc drawn trom itsl resziag-plue l2 tov/ard to and in contact with point il. rl`his operation will result in changing the connection ol vthe bit ter)V Il as to the line and ground and ol establishingr a circuit embracingl the li ic li, arnriture 15, pain tt, positive pole ot' itatterv il, points l2 and lt. arinaturi` lo, and ground The battery, therci'ore. is connected \\'i h this positi\ e pole to the line and negitive pole to the ground -that is, oppo- .\s longl as l the operator holds the lever depressed, the

armatures and ltwlll rcniain in this poi-'itioii, and as the receiving instrument, a polarized device, requires an opposite curbe closed as longl as this armature remains there, hut as soon as the operator releases the lever the circuit., including the coil ol` elec tromagnet` 10,15 broken, and its arinat ure will tall downward to stop 12, and the current l'loviing through circuit 1S and 2l will An nnpulse, theretorewill l energize the coil oi: electroniagnet 7, l ringing its armature to stop 13 and reversing the ilow of the current.

Persons versed in the art will readily understand that with this arrengeinent reversals are sent over the line, and if a proper receiving instrument is included in the line at the receiving-station the saine may be made to Y' translate these reversals into dots and dashes and be read by thev operator in the usual he satisfactory for all purt nected to liniand manner.

.ln lfig. 2 the binding-posts, negative and positive, designate the places Where the batter)r b is to be att-ached, the binding-posts G and L the places where the ground and line have to he connected. The binding-post designates the place where onev ter-initial oil clectroniagnet 1t) is to he connected, the binding-post 227 where one terminal oi electromagnet is to he connected, and the binding-post ny designates the placey where the `iunction oll the ivire 2t) is connected. in all other respects the designation ol similar parts is similar to the designation in Fig, 1.

l have dcscrihl :the device as being con- .ound, respectively; but it is. obvious that iv; a metallic return is equal ground return the expression groundH iin indes a metallic as well as cart-li return.

llaving nou' described ni'y invention, what i claim as new, and desire to'secure by Letters iatent, is-- 1. lo telcgraphy, a transmitting device comprising the het proper, tivo localized circuits, each containing an clectromagnct, the resistance ol' both these circuits diil'ciing t'rom each other, an armature l'or each electromagnet, means to connect said armatures to the line and ground'respectively, a source ol' current l'or the line and means to change the connection ol` said source as to the line. and ground through tht` inownient ol the lever oll the l\'e proper.

il, ln a tch-graphic transmitting device, a hey, tu'o localized circuits. one oll said localized circuits adapted to heopened andclosed.'

through the hey-switch and the second of said localized circuits adapted to be opened and closed through the lier-lever.

Si. .-1 telegraphlc. transmitter embracing the liev proper, tivo localized circuits, each IOC IIS

directly, a source of current for said line and in'cans to connect said source with one or tlie other of its poles to tlie line and ground respectively, said means dependent on tlie operation of said key.

4.` In aidevice of tlie class described, trans initting,` means, two circuits operatively related to said means, eacli circuit comprisinzgT an electromagiiet,'nieans at said transmitting means to inake operative one or the otlier of said circuits, a source of current, and means operatively related to said electromagnets to connect said source with the positive or negative pole to a line of transmission.

5. A telegrapliic transmitter comprising tlie manually-operated key proper and two electromagnets in operative relation to said key, an electric circuit for each of saifJ e1ec,

tromagnets, means integral With saiu key to make operative one or the other of said circuits aiid means integral With eacli of said electromagnets to connect a source of current to tlie line of transmission Wi th the positive or negative pole.

In `testimony whereof I afiix my signature in presence of two Witnesses.

. ISIDOR KITSEE. Witnesses:

MARY' C. SMITH, ALvAH RiTTENiioUsE. 

